import tensorflow as tf

a = tf.constant(5,name="input_a")
b = tf.constant(3,name="input_b")
c = tf.mul(a,b,name="mul_c")
d = tf.add(a,b,name="add_d")
e = tf.add(c,d,name="add_e")

sess = tf.Session()
sess.run(e)
print sess,e